Nampa weather in December: Nampa, Idaho: normal highs, lows, rain and records for December
Nampa in December has a normal high of 40°F and a normal low of 23°F, a daily mean of 31°F, falling from 44°F on the 1st to 38°F by the 31st. Measurable precipitation falls on 11 days in a normal December, 1.39 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 4°C and low of −5°C, 35 mm of precipitation and 11 cm of snow in December.
- NOAA stationNampa Sugar Factory
- Station IDUSC00106305
- Location43.60°N 116.58°W
- Elevation2,470 ft (753 m)
- Population117,350
- Jan 40° 23°
- Feb 47° 26°
- Mar 57° 32°
- Apr 65° 36°
- May 74° 44°
- Jun 83° 51°
- Jul 93° 57°
- Aug 92° 56°
- Sep 81° 47°
- Oct 67° 37°
- Nov 51° 28°
- Dec 40° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Nampa in December?
The normal high is 40°F and the normal low 23°F, for a daily mean of 31.4°F. December is 8.1°F cooler than November and 0.2°F warmer than January. December is the 11th warmest month of the year in Nampa and the wettest, and the snowiest. Across the month the normal high falls 6°F, from 44°F on December 1 to 38°F on December 31. From one year to the next December's mean temperature typically moves about 4.1°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 27°F and 36°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 44°F | 25°F | 35% | 15% |
| December 8 | 41°F | 24°F | 35% | 15% |
| December 15 | 40°F | 23°F | 35% | 15% |
| December 22 | 39°F | 22°F | 34% | 15% |
| December 31 | 38°F | 22°F | 34% | 16% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 25)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 44°F | 25°F | 35% | 15% | 9 h 10 min |
| December 2 | 43°F | 25°F | 35% | 15% | 9 h 10 min |
| December 3 | 43°F | 25°F | 35% | 15% | 9 h 10 min |
| December 4 | 43°F | 24°F | 35% | 14% | 9 h 10 min |
| December 5 | 42°F | 24°F | 35% | 14% | 9 h 10 min |
| December 6 | 42°F | 24°F | 35% | 15% | 9 h 10 min |
| December 7 | 42°F | 24°F | 35% | 15% | 9 h |
| December 8 | 41°F | 24°F | 35% | 15% | 9 h |
| December 9 | 41°F | 23°F | 35% | 15% | 9 h |
| December 10 | 41°F | 23°F | 35% | 15% | 9 h |
| December 11 | 41°F | 23°F | 35% | 15% | 9 h |
| December 12 | 40°F | 23°F | 35% | 15% | 9 h |
| December 13 | 40°F | 23°F | 35% | 15% | 9 h |
| December 14 | 40°F | 23°F | 35% | 15% | 9 h |
| December 15 | 40°F | 23°F | 35% | 15% | 9 h |
| December 16 | 40°F | 22°F | 34% | 15% | 9 h |
| December 17 | 39°F | 22°F | 34% | 15% | 9 h |
| December 18 | 39°F | 22°F | 34% | 15% | 9 h |
| December 19 | 39°F | 22°F | 34% | 15% | 9 h |
| December 20 | 39°F | 22°F | 34% | 15% | 9 h |
| December 21 | 39°F | 22°F | 34% | 15% | 9 h |
| December 22 | 39°F | 22°F | 34% | 15% | 9 h |
| December 23 | 39°F | 22°F | 34% | 15% | 9 h |
| December 24 | 38°F | 22°F | 34% | 15% | 9 h |
| December 25 | 38°F | 22°F | 34% | 15% | 9 h |
| December 26 | 38°F | 22°F | 34% | 15% | 9 h |
| December 27 | 38°F | 22°F | 34% | 15% | 9 h |
| December 28 | 38°F | 22°F | 34% | 15% | 9 h |
| December 29 | 38°F | 22°F | 34% | 16% | 9 h |
| December 30 | 38°F | 22°F | 34% | 16% | 9 h |
| December 31 | 38°F | 22°F | 34% | 16% | 9 h |
- Normal high
- 40°FDecember average
- Normal low
- 23°FDecember average
- Precipitation
- 1.39 inmonth total
- Days with precipitation
- 110.01 inch or more
- Snowfall
- 4.2 inmonth total
- Nights at 32°F or colder
- 27
- Daylight
- 9 h 10 min to 9 hDecember 1 to December 31
- Sunshine
- 62%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00106305; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Nampa in December?
On a given December day the chance of 0.01 inch or more is 34% on average, highest around December 6 (35%). In all, 1.39 in falls on 11 days of a normal December.
In a normal December in Nampa, 27 nights fall to freezing, 4 days stay below freezing all day and snowfall averages 4.2 inches.
Snow falls on 4 days in a normal December, and an inch or more covers the ground on 4 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00106305.
What are the records for December in Nampa?
The warmest December temperature on this station's record (since 1976) is 65°F, on December 13, 1995; the coldest is −26°F, on December 22, 1990. The wettest December brought 3.84 in (1983); the snowiest, 15.3 inches (2008).
Source: records: ACIS, station USC00106305. Records and recent months use complete months only.
How does December in Nampa compare across Idaho?
Across the 85 places PlainClimate covers in Idaho, December normal highs run from 26°F in Island Park to 44°F in Glenns Ferry; Nampa's is 40°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.